CN104682896A - Audio amplifying circuit for multimedia loudspeaker box - Google Patents
Audio amplifying circuit for multimedia loudspeaker box Download PDFInfo
- Publication number
- CN104682896A CN104682896A CN201310631652.0A CN201310631652A CN104682896A CN 104682896 A CN104682896 A CN 104682896A CN 201310631652 A CN201310631652 A CN 201310631652A CN 104682896 A CN104682896 A CN 104682896A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- amplifier
- potentiometer
- ground connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses an audio amplifying circuit for a multimedia loudspeaker box. The audio amplifying circuit for the multimedia loudspeaker box comprises a first potentiometer, a second potentiometer, a third potentiometer, first to fourteenth capacitors, first to seventeenth resistors, a first amplifier, a second amplifier, a third amplifier and a fourth amplifier. Compared with the prior art, the audio amplifying circuit for the multimedia loudspeaker box has the characters of simple structure, lower manufacture cost, smaller distortion factor, and better compatibility, does not cause the loss of signals in the process of amplifying the signals, and can be extensively applied to various multimedia loudspeaker box devices.
Description
Technical field
The present invention relates to a kind of audio amplifier circuit, particularly relate to a kind of audio amplifier circuit for multimedia loudspeaker box.
Background technology
Multimedia technology has integration exactly, the technology of the computer generalization process sound texts and pictures information of real-time and interactivity, in recent years, Computer Multimedia Technology fast development also moves to maturity, microcomputer just can realize the digitlization of many traditional analogs, make video, audio frequency, image, animation and pictograph can together with process in a computer, multimedia loudspeaker box is infrastructure device wherein, the quality of its quality has influence on the result of use of whole multimedia system greatly, than being easier to distortion in the process that the audio amplifier circuit for multimedia loudspeaker box now amplifies at signal, the scope of application is narrower, and cost of manufacture is higher, the development of multimedia technology can not be adapted to.
Summary of the invention
Object of the present invention is just to provide a kind of audio amplifier circuit for multimedia loudspeaker box to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes the first potentiometer, second potentiometer, 3rd potentiometer, first electric capacity is to the 14 electric capacity, first resistance is to the 17 resistance, first amplifier, second amplifier, 3rd amplifier and the 4th amplifier, the first end of described first electric capacity is connected with the first signal input part of described audio amplifier circuit, second end of described first electric capacity is connected with the first end of described first potentiometer and the first end of described 6th resistance simultaneously, second end ground connection of described first potentiometer, the sliding end of described first potentiometer is connected with the first end of described second electric capacity and the first end of described first resistance simultaneously, second end of described second electric capacity is connected with the second end of described first resistance and the first end of described 3rd electric capacity simultaneously, second end of described 3rd electric capacity is connected with the first end of described second resistance and the in-phase input end of described first amplifier simultaneously, second end ground connection of described second resistance, the inverting input of described first amplifier is connected with the first end of described 3rd resistance and the first end of described 4th resistance simultaneously, second end of described 3rd resistance is connected with the positive pole of described 4th electric capacity, the minus earth of described 4th electric capacity, the output of described first amplifier simultaneously with the second end of described 4th resistance, the described first end of the 5th resistance is connected with the first signal output part of described audio amplifier circuit, second end of described 5th resistance is connected with the first end of described 5th electric capacity, second end ground connection of described 5th electric capacity, second end of described 6th resistance simultaneously with the first end of described 6th electric capacity, the first end of described 8th resistance, the inverting input of described second amplifier is connected with the first end of described 7th resistance, second end of described 7th resistance is connected with the first end of described second potentiometer and the secondary signal input of described audio amplifier circuit simultaneously, second end ground connection of described second potentiometer, the sliding end of described second potentiometer is connected with the first end of described 15 resistance and the first end of described 11 electric capacity simultaneously, second end of described 15 resistance is connected with the second end of described 11 electric capacity and the first end of described 12 electric capacity simultaneously, second end of described 12 electric capacity is connected with the first end of described 16 resistance and the in-phase input end of described 5th amplifier simultaneously, second end ground connection of described 16 resistance, the inverting input of described 5th amplifier is connected with the first end of described 17 resistance and the first end of described 18 resistance simultaneously, second end of described 17 resistance is connected with the positive pole of described 13 electric capacity, the minus earth of described 13 electric capacity, the output of described 5th amplifier simultaneously with the second end of described 18 resistance, the described first end of the 19 resistance is connected with the secondary signal output of described audio amplifier circuit, second end of described 19 resistance is connected with the first end of described 14 electric capacity, second end ground connection of described 14 electric capacity, the in-phase input end ground connection of described second amplifier, second end of described 6th electric capacity simultaneously with the second end of described 8th resistance, the output of described second amplifier is connected with the first end of described 9th resistance, second end of described 9th resistance simultaneously with the first end of described tenth resistance, the first end of described 8th electric capacity, the output of described 3rd amplifier is connected with the inverting input of described 3rd amplifier, second end of described tenth resistance is connected with the first end of described 7th electric capacity and the in-phase input end of described 3rd amplifier simultaneously, second end ground connection of described 7th electric capacity, second end of described 8th electric capacity is connected with the first end of described 11 resistance, second end of described 11 resistance is connected with the first end of described 3rd potentiometer, second end ground connection of described 3rd potentiometer, the sliding end of described 3rd potentiometer is connected with the first end of described 9th electric capacity, second end of described 9th electric capacity is connected with the first end of described 12 resistance and the in-phase input end of described 4th amplifier simultaneously, second end ground connection of described 12 resistance, the inverting input of described 4th amplifier is connected with the first end of described 13 resistance and ground connection, the output of described 4th amplifier simultaneously with the second end of described 13 resistance, 3rd signal output part of described audio amplifier circuit is connected with the first end of described 14 resistance, second end of described 14 resistance is connected with the first end of described tenth electric capacity, second end ground connection of described tenth electric capacity.
Particularly, described 4th electric capacity and described 13 electric capacity are polar capacitor.
Beneficial effect of the present invention is:
The present invention is a kind of audio amplifier circuit for multimedia loudspeaker box, and structure is simple, and cost of manufacture is lower, and in the process that signal amplifies, cause the loss of signal hardly, the distortion factor is less, better compatible, can be widely used in various multimedia loudspeaker box equipment.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of audio amplifier circuit for multimedia loudspeaker box of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the present invention includes the first potentiometer W1, second potentiometer W2, 3rd potentiometer W3, first electric capacity C1 is to the 14 electric capacity C14, first resistance R1 is to the 17 resistance R17, first amplifier IC1, second amplifier IC2, 3rd amplifier IC3 and the 4th amplifier IC4, the first end of the first electric capacity C1 is connected with the first signal input part IN1 of audio amplifier circuit, second end of the first electric capacity C1 is connected with the first end of the first potentiometer W1 and the first end of the 6th resistance R6 simultaneously, the second end ground connection of the first potentiometer W1, the sliding end of the first potentiometer W1 is connected with the first end of the second electric capacity C2 and the first end of the first resistance R1 simultaneously, second end of the second electric capacity C2 is connected with second end of the first resistance R1 and the first end of the 3rd electric capacity C3 simultaneously, second end of the 3rd electric capacity C3 is connected with the first end of the second resistance R2 and the in-phase input end of the first amplifier IC1 simultaneously, the second end ground connection of the second resistance R2, the inverting input of the first amplifier IC1 is connected with the first end of the 3rd resistance R3 and the first end of the 4th resistance R4 simultaneously, second end of the 3rd resistance R3 is connected with the positive pole of the 4th electric capacity C4, the minus earth of the 4th electric capacity C4, the output of the first amplifier IC1 simultaneously with second end of the 4th resistance R4, the first end of the 5th resistance R5 is connected with the first signal output part OUT1 of audio amplifier circuit, second end of the 5th resistance R5 is connected with the first end of the 5th electric capacity C5, the second end ground connection of the 5th electric capacity C5, second end of the 6th resistance R6 simultaneously with the first end of the 6th electric capacity C6, the first end of the 8th resistance R8, the inverting input of the second amplifier IC2 is connected with the first end of the 7th resistance R7, second end of the 7th resistance R7 is connected with the first end of the second potentiometer W2 and the secondary signal input IN2 of audio amplifier circuit simultaneously, the second end ground connection of the second potentiometer W2, the sliding end of the second potentiometer W2 is connected with the first end of the 15 resistance R15 and the first end of the 11 electric capacity C11 simultaneously, second end of the 15 resistance R15 is connected with second end of the 11 electric capacity C11 and the first end of the 12 electric capacity C12 simultaneously, second end of the 12 electric capacity C12 is connected with the first end of the 16 resistance R16 and the in-phase input end of the 5th amplifier simultaneously, the second end ground connection of the 16 resistance R16, the inverting input of the 5th amplifier is connected with the first end of the 17 resistance R17 and the first end of the 18 resistance simultaneously, second end of the 17 resistance R17 is connected with the positive pole of the 13 electric capacity C13, the minus earth of the 13 electric capacity C13, the output of the 5th amplifier simultaneously with the second end of the 18 resistance, the first end of the 19 resistance is connected with the secondary signal output OUT2 of audio amplifier circuit, second end of the 19 resistance is connected with the first end of the 14 electric capacity C14, the second end ground connection of the 14 electric capacity C14, the in-phase input end ground connection of the second amplifier IC2, second end of the 6th electric capacity C6 simultaneously with second end of the 8th resistance R8, the output of the second amplifier IC2 is connected with the first end of the 9th resistance R9, second end of the 9th resistance R9 simultaneously with the first end of the tenth resistance R10, the first end of the 8th electric capacity C8, the output of the 3rd amplifier IC3 is connected with the inverting input of the 3rd amplifier IC3, second end of the tenth resistance R10 is connected with the first end of the 7th electric capacity C7 and the in-phase input end of the 3rd amplifier IC3 simultaneously, the second end ground connection of the 7th electric capacity C7, second end of the 8th electric capacity C8 is connected with the first end of the 11 resistance R11, second end of the 11 resistance R11 is connected with the first end of the 3rd potentiometer W3, the second end ground connection of the 3rd potentiometer W3, the sliding end of the 3rd potentiometer W3 is connected with the first end of the 9th electric capacity C9, second end of the 9th electric capacity C9 is connected with the first end of the 12 resistance R12 and the in-phase input end of the 4th amplifier IC4 simultaneously, the second end ground connection of the 12 resistance R12, the inverting input of the 4th amplifier IC4 is connected with the first end of the 13 resistance R13 and ground connection, the output of the 4th amplifier IC4 simultaneously with second end of the 13 resistance R13, 3rd signal output part OUT3 of audio amplifier circuit is connected with the first end of the 14 resistance R14, second end of the 14 resistance R14 is connected with the first end of the tenth electric capacity C10, the second end ground connection of the tenth electric capacity C10, 4th electric capacity C4 and the 13 electric capacity C13 is polar capacitor.
Claims (2)
1. the audio amplifier circuit for multimedia loudspeaker box, it is characterized in that: comprise the first potentiometer, second potentiometer, 3rd potentiometer, first electric capacity is to the 14 electric capacity, first resistance is to the 17 resistance, first amplifier, second amplifier, 3rd amplifier and the 4th amplifier, the first end of described first electric capacity is connected with the first signal input part of described audio amplifier circuit, second end of described first electric capacity is connected with the first end of described first potentiometer and the first end of described 6th resistance simultaneously, second end ground connection of described first potentiometer, the sliding end of described first potentiometer is connected with the first end of described second electric capacity and the first end of described first resistance simultaneously, second end of described second electric capacity is connected with the second end of described first resistance and the first end of described 3rd electric capacity simultaneously, second end of described 3rd electric capacity is connected with the first end of described second resistance and the in-phase input end of described first amplifier simultaneously, second end ground connection of described second resistance, the inverting input of described first amplifier is connected with the first end of described 3rd resistance and the first end of described 4th resistance simultaneously, second end of described 3rd resistance is connected with the positive pole of described 4th electric capacity, the minus earth of described 4th electric capacity, the output of described first amplifier simultaneously with the second end of described 4th resistance, the described first end of the 5th resistance is connected with the first signal output part of described audio amplifier circuit, second end of described 5th resistance is connected with the first end of described 5th electric capacity, second end ground connection of described 5th electric capacity, second end of described 6th resistance simultaneously with the first end of described 6th electric capacity, the first end of described 8th resistance, the inverting input of described second amplifier is connected with the first end of described 7th resistance, second end of described 7th resistance is connected with the first end of described second potentiometer and the secondary signal input of described audio amplifier circuit simultaneously, second end ground connection of described second potentiometer, the sliding end of described second potentiometer is connected with the first end of described 15 resistance and the first end of described 11 electric capacity simultaneously, second end of described 15 resistance is connected with the second end of described 11 electric capacity and the first end of described 12 electric capacity simultaneously, second end of described 12 electric capacity is connected with the first end of described 16 resistance and the in-phase input end of described 5th amplifier simultaneously, second end ground connection of described 16 resistance, the inverting input of described 5th amplifier is connected with the first end of described 17 resistance and the first end of described 18 resistance simultaneously, second end of described 17 resistance is connected with the positive pole of described 13 electric capacity, the minus earth of described 13 electric capacity, the output of described 5th amplifier simultaneously with the second end of described 18 resistance, the described first end of the 19 resistance is connected with the secondary signal output of described audio amplifier circuit, second end of described 19 resistance is connected with the first end of described 14 electric capacity, second end ground connection of described 14 electric capacity, the in-phase input end ground connection of described second amplifier, second end of described 6th electric capacity simultaneously with the second end of described 8th resistance, the output of described second amplifier is connected with the first end of described 9th resistance, second end of described 9th resistance simultaneously with the first end of described tenth resistance, the first end of described 8th electric capacity, the output of described 3rd amplifier is connected with the inverting input of described 3rd amplifier, second end of described tenth resistance is connected with the first end of described 7th electric capacity and the in-phase input end of described 3rd amplifier simultaneously, second end ground connection of described 7th electric capacity, second end of described 8th electric capacity is connected with the first end of described 11 resistance, second end of described 11 resistance is connected with the first end of described 3rd potentiometer, second end ground connection of described 3rd potentiometer, the sliding end of described 3rd potentiometer is connected with the first end of described 9th electric capacity, second end of described 9th electric capacity is connected with the first end of described 12 resistance and the in-phase input end of described 4th amplifier simultaneously, second end ground connection of described 12 resistance, the inverting input of described 4th amplifier is connected with the first end of described 13 resistance and ground connection, the output of described 4th amplifier simultaneously with the second end of described 13 resistance, 3rd signal output part of described audio amplifier circuit is connected with the first end of described 14 resistance, second end of described 14 resistance is connected with the first end of described tenth electric capacity, second end ground connection of described tenth electric capacity.
2. a kind of audio amplifier circuit for multimedia loudspeaker box according to claim 1, is characterized in that: described 4th electric capacity and described 13 electric capacity are polar capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631652.0A CN104682896A (en) | 2013-11-28 | 2013-11-28 | Audio amplifying circuit for multimedia loudspeaker box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631652.0A CN104682896A (en) | 2013-11-28 | 2013-11-28 | Audio amplifying circuit for multimedia loudspeaker box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104682896A true CN104682896A (en) | 2015-06-03 |
Family
ID=53317560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310631652.0A Pending CN104682896A (en) | 2013-11-28 | 2013-11-28 | Audio amplifying circuit for multimedia loudspeaker box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104682896A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376678A (en) * | 2015-11-24 | 2016-03-02 | 宁波柏人艾电子有限公司 | An audio adjusting circuit |
| CN105472506A (en) * | 2015-11-24 | 2016-04-06 | 宁波柏人艾电子有限公司 | Microphone circuit audio control circuit |
| CN106681468A (en) * | 2016-12-31 | 2017-05-17 | 马鞍山格尚智能装备有限公司 | Screen power supply amplification device based on smartphone |
-
2013
- 2013-11-28 CN CN201310631652.0A patent/CN104682896A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376678A (en) * | 2015-11-24 | 2016-03-02 | 宁波柏人艾电子有限公司 | An audio adjusting circuit |
| CN105472506A (en) * | 2015-11-24 | 2016-04-06 | 宁波柏人艾电子有限公司 | Microphone circuit audio control circuit |
| CN106681468A (en) * | 2016-12-31 | 2017-05-17 | 马鞍山格尚智能装备有限公司 | Screen power supply amplification device based on smartphone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204090123U (en) | Audio output control circuit and audio-frequence player device | |
| CN206908729U (en) | A kind of TYPE C turn the signal conversion line of DP interfaces | |
| CN104682896A (en) | Audio amplifying circuit for multimedia loudspeaker box | |
| CN103137134A (en) | Watermark information loading method of audio device and audio signal | |
| CN205105345U (en) | Audio frequency and video playback devices | |
| CN103581569A (en) | Method and system for recording electric power system teaching courseware | |
| CN203151703U (en) | Sound pick-up device | |
| CN107295307A (en) | Word and Video sync control system based on remote control | |
| CN103050845A (en) | HDMI (High-Definition Multimedia Interface) wire with amplifier | |
| CN203120015U (en) | Video signal amplification circuit | |
| CN104300926A (en) | Audio power amplifier used for multimedia electronic equipment | |
| CN204559799U (en) | A kind of Set Top Box with communication function | |
| CN206117993U (en) | Audio frequency ground keeps apart differential circuit and audio amplifier | |
| CN204362255U (en) | MPS microphone power supply | |
| CN204013933U (en) | A kind of TV set-top box with audio amplifier | |
| CN203492086U (en) | Signal transmission circuit for precisely synchronizing video monitoring signals | |
| CN104601957A (en) | Multimedia view screen signal transmission device | |
| CN203406949U (en) | Record system of electric power system teaching courseware | |
| CN204206116U (en) | A kind of audio-frequency power amplifier for multimedia electronic equipment | |
| CN104618824A (en) | Wireless microphone with changeable amplitude | |
| CN204013410U (en) | A kind of computer broadband signal amplifier | |
| CN203180831U (en) | Front stereophonic amplifier | |
| CN203872139U (en) | High-signal-to-noise-ratio actual sound recording sound console device convenient to carry and capable of reducing noise | |
| CN205901755U (en) | Computer network signal anti -jamming circuit | |
| CN202502443U (en) | Multifunctional display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |